$A$ vitamin which plays a metabolic role in the conversion of pyruvic acid into acetyl $CoA$ is

Citric acid is formed in the Krebs cycle by the combination of oxaloacetate with:

The $TCA$ cycle starts with the condensation of an acetyl group with:

The enzyme $Fumarase$ catalyzes which of the following conversions?

Succinic dehydrogenase is associated with which process of the Krebs cycle?

All enzymes of the $TCA$ cycle are found in the mitochondrial matrix. Exceptionally, one enzyme is located on the inner mitochondrial membrane in eukaryotes and in the cytoplasm in prokaryotes. Identify this enzyme.